What is the difference between ARG and ENV in a Dockerfile?
An example of an AI chatbot conversation about the differences between ARG and ENV in Dockerfiles.
What is the difference between ARG and ENV in a Dockerfile?
In a Dockerfile, ARG is used to define variables that users can pass at build-time, while ENV sets environment variables that are available during the container's runtime.
Can you give me an example of how to use both in a Dockerfile?
Sure! Here's a simple example:
FROM ubuntu:latest
ARG VERSION=1.0
ENV APP_VERSION=$VERSION
RUN echo "App version is $APP_VERSION"
In this example, VERSION is an ARG that can be set during build, and APP_VERSION is an ENV that can be used at runtime.
Are there any limitations to using ARG?
Yes, ARG values are not available after the image is built, and they cannot be accessed in the running container. They are only available during the build process.
When should I use ENV instead of ARG?
Use ENV when you need to set variables that should persist in the running container, such as configuration settings or secrets.
Use ChatGPT in Telegram
Get this answer and more from ChatGPT in Telegram, try it for free!
Get Started For FreeWhat can MagicBuddy do?
The Friendly AI in Your Pocket
Powered by advanced language models trained on billions of online words and conversations, MagicBuddy delivers friendly and helpful chat on demand.
Ask questions and get answers. Crack jokes and get laughs. Or even get writing ideas and study help. MagicBuddy's conversational intelligence allows for a truly unique and useful chat experience.
Curious? Try these prompts:
Telegram's Best AI-Powered Chatbot
MagicBuddy is incredibly easy to use and the responses are lightning fast! 🥇
Impressive! MagicBuddy is my go-to AI assistant. It’s quick, accurate, and user-friendly.
Sending voice messages makes it easier to use in the middle of the day and the answers are super fast.
Love it! A friend of mine told me about it and it has made my life so much easier. It’s like having a helpful friend in my pocket!
I use 2 months already, simply amazing! MagicBuddy delivers answers in a snap. It’s a must-have tool for staying informed!
Game-changer! MagicBuddy’s speed and accuracy are unmatched. It’s my secret weapon for productivity
Talk to ChatGPT on Telegram
Say Hello to Your New Telegram BFF - Try MagicBuddy Free!
Get Started For Free